電工鋼硅鋼片：用 25cm 愛(ài)潑斯坦方圈測(cè)量時(shí)，參照檢測(cè)方法 GB/T 3655（IEC 60404-2，IDT）,一副試樣由不少于24 片的樣片組成。試樣的長(zhǎng)度方向應(yīng)沿平行于產(chǎn)品軋制方向切取，試樣長(zhǎng)度方向與產(chǎn)品軋制方向的偏離角度應(yīng)在±1 以內(nèi)，試樣應(yīng)盡可能覆蓋產(chǎn)品的全板寬范圍。試樣應(yīng)的取樣方法、云南紅河附近尺寸及允許偏差應(yīng)符合 GB/T 3655 的規(guī)定。測(cè)試前，試樣應(yīng)在制造方提供的條件下進(jìn)行應(yīng)力退火處理。測(cè)試產(chǎn)品時(shí)效試樣的 比總損耗時(shí)，時(shí)效試樣應(yīng)在 225℃±5℃溫度中持續(xù)保溫 24h，然后空冷到環(huán)境溫度。8.5.2 單片法（SST）測(cè)量用單片測(cè)試儀測(cè)量時(shí)，試樣的取樣方法、云南紅河附近尺寸及允許偏差應(yīng)符合 GB/T 13789（IEC 60404-3，IDT)）的規(guī)定。為保證磁性測(cè)試結(jié)果對(duì)帶鋼磁性能的代表性，裁剪大單片試樣時(shí)，試樣沿縱向的中心線位置與產(chǎn)品寬度方向中心位置偏移量應(yīng)≤50mm，試樣縱向與樣板軋制方向的偏離角度應(yīng)在±1 以內(nèi)。單片法測(cè)量的試樣不需要應(yīng)力退火處理，也不允許進(jìn)行時(shí)效測(cè)試。

電工鋼硅鋼片硅鋼是一種硅鐵合金。用硅鋼軋制的片材是電工領(lǐng)域中應(yīng)用廣的軟磁材料，因而硅鋼片又稱(chēng)電工鋼片。硅鋼片廣泛用于電動(dòng)機(jī)、發(fā)電機(jī)、變壓器、扼流圈、電磁機(jī)構(gòu)、繼電器及測(cè)量?jī)x表中電機(jī)工業(yè)大量使用厚度為0.35～0.50mm的硅鋼片,用于：中型旋轉(zhuǎn)機(jī)，壓縮電機(jī)，通用馬達(dá)，小型精密電機(jī)，電動(dòng)汽車(chē)，壓縮機(jī)，通用電機(jī)，電源變壓器，精密變壓器，節(jié)能電機(jī)，焊機(jī)變壓器，穩(wěn)壓器，磁性密封器，加速器用電磁鐵，汽車(chē)電機(jī)等；在電信高頻技術(shù)中常用0.05~0.20mm的薄帶鋼片,以便更有效地降低渦流損耗。熱軋硅鋼片厚度為0.35～0.50mm，密度為7.55～7.70g/cm3,多用于大、中、小型交、直流電動(dòng)機(jī)；冷軋無(wú)取向硅鋼片厚度為0.35～0.50mm，密度為7.65～7.75g/cm3，多用于大型交流發(fā)電機(jī)、電動(dòng)機(jī)，大、中、小型交、直流電動(dòng)機(jī)；冷軋取向硅鋼片厚度為0.23mm 0.27mm 0.3mm 0.35mm，密度為7.65g/cm3,多用于電力變壓器、油浸式變壓器，干式變壓器，電抗器、磁放大器等；冷軋取向薄帶厚度為0.05～0.20mm，多用于無(wú)線電高頻變壓器。

電工鋼硅鋼片Electrical steel, also known as silicon steel sheet, is an indispensable metal material in the power, electronics, and military industries, and is also the largest functional material in production. It is mainly used as the iron core for various motors, generators, and transformers. Specific total loss (iron loss) is the total power consumed per unit mass of material when the magnetic polarization waveform remains sinusoidal, with a specific peak and frequency. The specific total loss is represented by the symbol P (Jm/f), in W/kg. Example: P1.5/50 represents the specific total loss at a maximum magnetic polarization intensity of 1.5T and a frequency of 50Hz. 3.2 Magnetic Polarization Q/BQB 480-20212 Magnetic polarization intensity refers to the peak magnetic polarization intensity of a specific magnetic field intensity when a sample is subjected to alternating magnetization. Its symbol is J (H), and the unit is T (Tesla). Example: J5000 represents the peak magnetic polarization intensity corresponding to a magnetic field intensity peak of 5000A/m. The material grades in this document are classified based on the nominal maximum specific total loss P1.5/50 (W/kg) at a magnetic polarization strength of 1.5T and a frequency of 50Hz, as well as the nominal thickness of the material. They are further divided into three categories based on product characteristics: ordinary type, stress relief annealing type, and high-efficiency type. Example 1: B35A210 represents a common non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 2.10W/kg； Example 2: B35AR300 represents a stress relieved annealed non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 3.00W/kg； Example 3: B35AH230 represents an efficient non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. Example 4: 35WW210 represents a normal type WW non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.10W/kg. Example 5: 35WH230 represents an efficient WH non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. The classification and code of insulation coatings shall comply with the provisions of Table 2. Table 2 Classification and Code of Insulation Coatings Type Code Characteristics of Insulation Coatings Semi organic Thin Coating A Improves Punching Performance and Has Good Weldability Semi organic Thick Coating H has Good Punching Performance and High Interlayer Resistance Semi organic Chromium Free Thin Coating K does not contain chromium and has good weldability Semi organic Chromium Free Thick Coating M does not contain chromium and has good insulation performance Semi organic Chromium Free Extreme Thick Coating J does not contain chromium and has excellent insulation performance Semi organic Chromium Free Ultra Thick Coating L does not contain chromium and has extremely high insulation performance Self adhesive Coating